We came back last Sat. evening (not late) from Hollywood to the Anaheim Amtrak station. We had to call for a cab to get to the DLH. There was a game still going on at the stadium but no cabs. A couple who got off the train a little before us also had to call for a cab.
There is a phone inside the station by the doors that is free and I'm pretty sure it's marked. You just pick it up and tell them you need a cab at the Anaheim Amtrak station. They'll ask for a name and the number of people and they'll send one. Since you have a lot of luggage, be sure to tell them that. If you only have 2 people they'll probably send a regular taxi, if you have more people or tell them there is a lot of luggage, they'll most likely send a mini-van taxi.
It cost us around $12 - 15 (can't remember exactly and if that was before or after the tip). It didn't take very long for him to get there.